Cast to unsigned char for ctype calls.

src/librc/librc-depend.c

@@ -847,7 +847,7 @@ bool rc_deptree_update(void)
 		nosys[0] = 'n';
 		nosys[1] = 'o';
 		for (i = 0; i < len; i++)
-			nosys[i + 2] = (char) tolower((int) sys[i]);
+			nosys[i + 2] = (char)tolower((unsigned char)sys[i]);
 		nosys[i + 2] = '\0';
 
 		STAILQ_FOREACH_SAFE(depinfo, deptree, entries, depinfo_np)

src/rc/rc-applets.c

@@ -58,7 +58,7 @@ static int syslog_decode(char *name, CODE *codetab)
 {
 	CODE *c;
 
-	if (isdigit((int) *name))
+	if (isdigit((unsigned char)*name))
 		return atoi(name);
 
 	for (c = codetab; c->c_name; c++)
@@ -351,7 +351,7 @@ static int do_shell_var(int argc, char **argv)
 			putchar(' ');
 
 		while (*p) {
-			c = *p++;
+			c = (unsigned char)*p++;
 			if (! isalnum(c))
 				c = '_';
 			putchar(c);

src/rc/rc-logger.c

@@ -103,7 +103,7 @@ static void write_log(int logfd, const char *buffer, size_t bytes)
 			continue;
 		}
 
-		if (! in_term || isalpha((int) *p))
+		if (! in_term || isalpha((unsigned char)*p))
 			in_escape = in_term = false;
 cont:
 		p++;

src/rc/rc-misc.c

@@ -93,8 +93,8 @@ char *rc_conf_value(const char *setting)
 			TAILQ_FOREACH(s, rc_conf, entries) {
 				p = s->value;
 				while (p && *p && *p != '=') {
-					if (isupper((int) *p))
-						*p = tolower((int) *p);
+					if (isupper((unsigned char)*p))
+						*p = tolower((unsigned char)*p);
 					p++;
 				}
 			}

src/rc/rc.c

@@ -582,7 +582,7 @@ static void do_coldplug(void)
 			    strncmp(d->d_name, "ums", 3) == 0)
 			{
 				p = d->d_name + 3;
-				if (p && isdigit((int) *p)) {
+				if (p && isdigit((unsigned char)*p)) {
 					l = strlen("moused.") + strlen(d->d_name) + 1;
 					service = xmalloc(sizeof(char) * l);
 					snprintf (service, l, "moused.%s", d->d_name);

src/rc/start-stop-daemon.c

@@ -190,7 +190,7 @@ static SCHEDULEITEM *parse_schedule_item(const char *string)
 	item->gotoitem = NULL;
 	if (strcmp(string,"forever") == 0)
 		item->type = SC_FOREVER;
-	else if (isdigit((int) string[0])) {
+	else if (isdigit((unsigned char)string[0])) {
 		item->type = SC_TIMEOUT;
 		errno = 0;
 		if (sscanf(string, "%d", &item->value) != 1)